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Supramolecular Liquid Crystalline Polymers

超分子液晶聚合物

基本信息

批准号：
9206781
负责人：
Virgil Percec
金额：
$ 57.5万
依托单位：
Case Western Reserve University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1992
资助国家：
美国
起止时间：
1992-07-01 至 1998-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9206781&HistoricalAwards=false
关键词：
Supramolecular Liquid Crystalline Polymers

项目摘要

For the past 150 years, organic chemists were concerned with the understanding of the covalent bond. Recently, research on molecular recognition (generated by weak, non-covalent interactions) has been recognized worldwide as an important intellectual and technological frontier. Endo- (generated by convergent cavities) and exo (generated by larger bodies of similar size and shapes, or surfaces) molecular recognition, preorganization and self-organization provide the basis of spontaneous generation of functional supramolecular architectures via self-assembly from their components. It is now accepted that molecular recognition directed synthesis and self-assembly are responsible for the generation and properties of biological systems. This research aims to use molecular recognition both to self-assemble synthetic supramolecular liquid crystalline polymers and to direct their phase behavior. Two novel classes of polymers will be investigated: functional supramolecular polymers which self-assemble by using principles that resemble those of tobacco mosaic virus, and both cyclic main-chain polymers, as well as polymers containing liquid crystalline cyclophane (i.e., cyclic derivatives of main-chain liquid-crystalline oligomers) receptors as structural units. The second class of liquid-crystalline polymers will display molecular recognition directed phase transitions. It is expected that this research will produce molecular devices such as self-assembled supramolecular synthetic ion channels and various other systems which, by analogy with natural biological systems, will combine selective recognition with external regulation. Most important, this research will enable a step ahead in understanding some of the processes that nature uses and about which we know so little, and transplant them to the field of synthetic su pramolecular polymers.

在过去的150年里，有机化学家们一直在关注对共价键的理解最近，研究分子识别（由弱的、非共价的在世界范围内，它被认为是一个重要的知识和技术前沿。 Endo-（由会聚腔）和exo（由类似的较大物体产生）尺寸和形状，或表面）分子识别，预组织和自组织提供了功能性超分子结构的自发生成通过它们的组件进行自我组装。现在大家公认，分子识别定向合成和自组装，负责生物的产生和特性系统. 这项研究的目的是利用分子识别，自组装合成超分子液晶聚合物并指导它们的相行为。两类新型聚合物将研究：功能性超分子聚合物，利用类似于烟草的原理进行自我组装花叶病毒，和环状主链聚合物，以及含有液晶环蕃的聚合物（即，环状主链液晶低聚物的衍生物）受体作为结构单位。第二类液晶聚合物将显示分子识别定向相过渡。预计这项研究将产生分子器件如自组装超分子合成离子通道和各种其他系统，通过类比，自然生物系统，将结合联合收割机选择性识别，外部监管。最重要的是，这项研究将使在理解大自然使用的一些过程方面取得了进展而我们对此知之甚少，将它们移植到田间合成硫超分子聚合物